Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
NKLA
701
CALL
DELISTED
Nikola Corporation Common Stock
NKLA
| $12M | 0.01% |
40,433
+23,300
| +136% | +$7.77M |
|
702
Plug Power
PLUG
$3.07B
| $12M | 0.01% |
423,802
-77,115
| -15% | -$2.67M |
|
|
MRO
703
CALL
DELISTED
Marathon Oil Corporation
MRO
| $12M | 0.01% |
728,400
+436,500
| +150% | +$7.02M |
|
704
PUT
ZIM Integrated Shipping Services
ZIM
$3.09B
| $11.9M | 0.01% |
202,900
+114,100
| +128% | +$5.84M |
|
705
CALL
NCR Voyix
VYX
$1.05B
| $11.9M | 0.01% |
484,110
+236,676
| +96% | +$6.01M |
|
|
SHNY
706
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $11.9M | 0.01% |
634,100
+210,100
| +50% | +$3.96M |
|
|
DFS
707
PUT
DELISTED
Discover Financial Services
DFS
| $11.9M | 0.01% |
102,900
| – | – |
|
708
CALL
Bath & Body Works
BBWI
$3.9B
| $11.8M | 0.01% |
+174,800
| New | +$12.4M |
|
709
PUT
Phillips 66
PSX
$83B
| $11.8M | 0.01% |
162,500
+56,500
| +53% | +$4.27M |
|
710
Pinterest
PINS
$12.3B
| $11.8M | 0.01% |
+323,852
| New | +$14.4M |
|
711
PUT
WIX.com
WIX
$2.04B
| $11.8M | 0.01% |
74,500
+4,600
| +7% | +$798K |
|
712
CALL
Arista Networks
ANET
$222B
| $11.7M | 0.01% |
326,400
-547,200
| -63% | -$16.3M |
|
713
PUT
Toronto Dominion Bank
TD
$197B
| $11.7M | 0.01% |
152,500
-6,600
| -4% | -$481K |
|
714
PUT
Trump Media & Technology Group
DJT
$2.46B
| $11.7M | 0.01% |
+227,100
| New | +$10.3M |
|
715
CALL
Rio Tinto
RIO
$149B
| $11.6M | 0.01% |
173,500
-174,700
| -50% | -$11.3M |
|
|
EXAS
716
CALL
DELISTED
Exact Sciences
EXAS
| $11.6M | 0.01% |
149,200
+40,200
| +37% | +$3.55M |
|
|
ZNGA
717
CALL
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $11.6M | 0.01% |
1,809,300
+1,088,900
| +151% | +$7.51M |
|
718
CALL
Yum China
YUMC
$14.8B
| $11.5M | 0.01% |
230,600
+203,800
| +760% | +$11.1M |
|
719
CALL
Albemarle
ALB
$13.8B
| $11.5M | 0.01% |
49,100
+25,800
| +111% | +$6.38M |
|
720
CALL
Kraft Heinz
KHC
$30.1B
| $11.5M | 0.01% |
319,700
+45,000
| +16% | +$1.62M |
|
721
PUT
Clorox
CLX
$11.3B
| $11.5M | 0.01% |
65,800
+31,700
| +93% | +$5.28M |
|
722
CALL
Zoetis
ZTS
$31.3B
| $11.5M | 0.01% |
47,000
+16,100
| +52% | +$3.53M |
|
|
DISH
723
CALL
DELISTED
DISH Network Corp.
DISH
| $11.5M | 0.01% |
353,100
+42,200
| +14% | +$1.57M |
|
724
PUT
Thor Industries
THO
$3.9B
| $11.4M | 0.01% |
110,300
+73,400
| +199% | +$7.96M |
|
725
CALL
AstraZeneca
AZN
$261B
| $11.4M | 0.01% |
97,900
-170,000
| -63% | -$20M |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.